Antoaneta Frenkeva (Bulgarian: Антоанета Френкева, born 24 August 1971) is a former breaststroke swimmer from Bulgaria, who won the silver medal in the 100 m breaststroke at the 1988 Summer Olympics in Seoul, South Korea, just behind her teammate Tanya Dangalakova. In the same tournament the seventeen-year-old captured the bronze in the 200 m breaststroke.